Neptune is a single-player modification for Half-Life 2, taking place entirely outside the mother game's universe. Set primarily onboard a mysterious and desolate cruise liner, floating in the middle of the Atlantic Ocean, Neptune allows the player to slowly unravel the dark and disturbing past of the ship as he/she explores its once-grand rooms, corridors, concert halls, restaurants, bars and maintenance areas.
Taking influence from games such as System Shock 2, BioShock, Thief: Deadly Shadows and Silent Hill, Neptune is an atmospheric, narrative-driven, horror-based shooter; an exercise in videogame storytelling and tense level design.
It is expected to be released in Q3 2009.

The lighting isent actually that good, use a blocklight texture where the bars in the window are so you can get some nice shadows also change the angle of the sun to be half up the wall in the back, maybe add some dust motes. and you'll get some very nice lighting